If it fails: the first hour
What the site contact should do before the technician arrives.
- Note whether a recent maintenance report flagged the affected unit for follow-up
- Confirm filters have been changed on schedule before calling for emergency diagnosis
- Request the maintenance provider prioritize any unit flagged as high risk in the last inspection
What fails
What a service call includes
- Filter inspection and replacement on a set schedule
- Refrigerant charge check against manufacturer specification
- Condenser and evaporator coil cleaning
- Belt tension check and replacement if worn, plus motor bearing lubrication where applicable
- Condensate drain line flushing and float switch test
- Electrical component inspection including contactors, capacitors and wiring connections
- Economizer and damper operation check
- Written report after each visit with photos and any deficiencies noted for follow-up
Preventive checklist
The items a maintenance program should carry for this system. Build a combined checklist across systems with the checklist builder.
Spring
- Pre-cooling season visit covering refrigerant charge, coil cleaning and electrical checks
- Test economizer and outside air dampers before cooling demand increases
- Verify condensate drains are clear ahead of humid weather
Fall
- Pre-heating season visit covering heat exchanger, ignition system and gas piping
- Inspect belts and bearings before peak heating runtime
Quarterly
- Filter change or inspection
- Visual check of unit exterior, disconnects and safety switches
Annual
- Full inspection combining both seasonal visits into a full condition assessment
- Combustion analysis and carbon monoxide testing on gas-fired equipment
- Equipment age and efficiency review to plan for future replacement budgeting
What it costs
| item | typical range | what moves it |
|---|---|---|
| Maintenance contract, per rooftop unit per year | $300 to $800 | Number of visits included, typically two, and unit tonnage |
| Filter replacement, per visit | $15 to $60 per filter | Filter size, MERV rating and number of units on the property |
| Coil cleaning, per unit | $150 to $400 | Coil condition and whether chemical cleaning agents are needed |
| Belt and bearing service, per unit | $100 to $300 | Included in most maintenance contracts, billed separately for standalone visits |
National ranges. Local labor, access, after-hours timing and materials move them. Multi-site programs usually price below one-off calls.
How to choose a provider
- Ask how many visits per year are included and what specifically is checked at each visit
- Confirm the technician performing maintenance is the same one who would respond to a repair call, for continuity
- Ask whether the contract includes discounted repair rates or priority emergency response
- Check whether coil cleaning and belt replacement are included or billed as extras
- Ask for a sample maintenance report to see the level of detail documented
Questions
How much does an HVAC maintenance contract typically save compared to reactive repair?
The exact figure depends on equipment age and building size, but preventive maintenance generally reduces both the frequency of emergency calls and the severity of failures by catching problems early.
How many maintenance visits per year does a commercial system need?
Two is standard, one before cooling season and one before heating season, though buildings with heavy runtime or harsh environments sometimes benefit from quarterly visits.
Does a maintenance contract cover parts and repairs?
Usually not fully. Most contracts cover the scheduled inspection and basic service items like filters, with repairs billed separately, sometimes at a discounted contract rate.
What is the biggest factor in extending rooftop unit life?
Consistent coil cleaning and correct refrigerant charge, both of which directly affect how hard the compressor has to work.